import { MaybeObservable } from './types.js';
import { RollBackwardEvent, RollForwardEvent } from '../../types.js';
export interface ProjectorEventHandlers<ExtraRollForwardPropsIn, ExtraRollBackwardPropsIn, ExtraRollForwardPropsOut = ExtraRollForwardPropsIn, ExtraRollBackwardPropsOut = ExtraRollBackwardPropsIn> {
    rollForward: (evt: RollForwardEvent<ExtraRollForwardPropsIn>) => MaybeObservable<RollForwardEvent<ExtraRollForwardPropsOut>>;
    rollBackward: (evt: RollBackwardEvent<ExtraRollBackwardPropsIn>) => MaybeObservable<RollBackwardEvent<ExtraRollBackwardPropsOut>>;
}
export declare const projectorOperator: <ExtraRollForwardPropsIn, ExtraRollBackwardPropsIn, ExtraRollForwardPropsOut, ExtraRollBackwardPropsOut>({ rollForward, rollBackward }: ProjectorEventHandlers<ExtraRollForwardPropsIn, ExtraRollBackwardPropsIn, ExtraRollForwardPropsOut, ExtraRollBackwardPropsOut>) => <SourceExtraRollForwardPropsIn extends ExtraRollForwardPropsIn, SourceExtraRollBackwardPropsIn extends ExtraRollBackwardPropsIn>() => import("../../types.js").ExtChainSyncOperator<SourceExtraRollForwardPropsIn, SourceExtraRollBackwardPropsIn, ExtraRollForwardPropsOut, ExtraRollBackwardPropsOut>;
//# sourceMappingURL=projectorOperator.d.ts.map